Airtac SAIJ50 Adjustable Cylinder SAIJ50BX90-40S
The AirTAC Airtac SAIJ50 Adjustable Cylinder SAIJ50BX90-40S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø50mm bore and 90mm stroke, G1/4 air ports and adjustable end cushioning. Its standardized mounting interface makes it a drop-in replacement for other ISO 15552 cylinders in automation lines.
- BoreØ50 mm
- Stroke90 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM16×1.5
- CushionAdjustable, 30 mm
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac SAIJ50 Adjustable Cylinder SAIJ50BX90-40S
The AirTAC SAIJ50X90-40-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It delivers 982N of push force at 0.5 MPa and features a 90mm nominal stroke that can be fine-tuned down by up to 40mm, providing a usable travel window of 50-90mm. This wide adjustment band is ideal for dialing in exact end positions during machine commissioning without swapping hardware.
This specific SKU is configured with a SUS304 stainless steel rod (code B) for superior corrosion resistance and includes a magnet (-S) for position sensing. It uses PT tapered ports and retains the standard extruded aluminum barrel with sensor grooves on both sides. The rear adjuster acts purely as a travel stop to set deceleration, meaning it will not hold a load without live air pressure.
Airtac SAIJ50 Adjustable Cylinder SAIJ50BX90-40S Technical Specifications
| Model | Airtac SAIJ50 Adjustable Cylinder SAIJ50BX90-40S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø50 mm |
| Stroke | 90 mm |
| Acting type | Double acting |
| Port size | G1/4 |
| Rod thread | M16×1.5 |
| Fluid | Air (filtered by 40µm element) |
|---|---|
| Operating pressure | 0.15 – 1.0 MPa |
| Proof pressure | 1.5 MPa |
| Temperature | -20 to +70 °C |
| Speed range | 30 – 800 mm/s |
| Cushion | Adjustable, 30 mm |
| Max stroke | Up to 1200 mm |
Specifications follow the official AirTAC SAI series datasheet and ISO 15552 dimensions. Confirm against the product label before installation. Port options: G (BSPP) / NPT.
Theoretical Output Force (Ø50mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 982 N | 825 N |
| 0.7 MPa | 1374 N | — |
| Max (@1.0 MPa) | 200 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAIJ50 Adjustable Cylinder SAIJ50BX90-40S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×90 | Stroke length in mm. |
| -S | Optional built-in magnet for sensor position sensing. |
Related SAI-family variants: SAID (double rod), SAIJ (adjustable stroke), SAIL (with lock), SAIF (with valve), BSAI (enclasp / clamp-lock), and SAI-S with built-in magnet. Rod material: carbon steel (blank) / SUS420J2 (A) / SUS304 (B); seals: TPU (blank) / Viton H / NBR N.
Where the Airtac SAIJ50 Adjustable Cylinder SAIJ50BX90-40S Is Used
Machine Setup & Changeover
Dial in the exact 50-90mm travel window during commissioning or product changeovers without adding external stopper blocks to the fixture.
Variable End-Stop Positioning
Use the 40mm rear adjustment screw to alter the retract end-position on the fly for packaging lines running multiple carton sizes.
Corrosion-Resistant Actuation
Leverage the SUS304 stainless steel rod in light manufacturing environments where moisture or minor chemical splash is present.
Is the Airtac SAIJ50 Adjustable Cylinder SAIJ50BX90-40S the Right Cylinder?
Choose this 50mm bore when an application requires approximately 982N of push force at 0.5 MPa, stepping up from a 40mm bore (628N) or down from a 63mm bore (1559N). An adjustable stroke is preferred over a fixed SAI cylinder when you need variable end-stops for rapid product-size changeovers on a line. To match this ISO 15552 replacement exactly, specify the 50mm bore, 90mm stroke, 40mm adjustment, PT port, SUS304 rod, and the -S magnet.
Because the nominal stroke is under 300mm, side-load concerns are minimal, but always ensure the load is guided externally. For load-holding requirements without continuous air pressure, note that this cylinder's adjuster is not a lock; you should explore an AirTAC SAIL or BSAI model instead.
Quick checklist
- ✓ Required force at your working pressure
- ✓ Stroke and mounting space
- ✓ Port/thread type (PT/NPT/G)
- ✓ Magnet (-S) for sensors?
- ✓ Side load — consider a guided cylinder
Installation & Maintenance Notes
- check Use clean air filtered to 40µm or finer.
- check Keep within 0.15 – 1.0 MPa operating pressure.
- check Avoid side load on the piston rod.
- check Adjust end cushion screws for smooth stops.
- check Use correct mounting accessory (FA/FB/CA/CB/LB/TC).
- check Installation by qualified personnel per AirTAC docs.
Airtac SAIJ50 Adjustable Cylinder SAIJ50BX90-40S FAQ
At 0.5 MPa, this 50mm bore cylinder provides 982N of push force and 825N of pull force. At 0.7 MPa, the push force increases to 1374N.
The rear adjuster screw allows you to trim the effective stroke by up to 40mm. With a 90mm nominal stroke, this creates a usable travel window of 50-90mm, though the adjuster acts only as a stop and does not lock the load without air pressure.
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